Improvement in attaching door-knobs to their spindles



y guilt'ehjtafs @anni @fge IMPROVEMENT IN ATTAGHIN DOOR-KNOBS T0 THEIR SPIN DLES.

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y rTo ALL vWHoM 1T MAY coNoER'N:

Be it known that I; 'CHARLES B. BRISTOL, of the city and county of New Haven, in the State of Cennecticut, have invented n new and useful Improvement in Knob-Latches for Doors, etc.; and I dohereby declare that the following is a full, clear, an'd exact description of the construction, character, and operation of theV same, reference being had to the accompanying drawing, which makes a part of'this specification, which drawing represents a section cut longitudinally through the shaft or spindle of the apparatus while on the door a's ready for use, showing the inclined plane on the inner end of the shaft o1 spindle, and the screw'which rests upon it; .also the spurs or points by which the roses may be steadiedon the door.

My improvement consists initting one end of the spindle or shaft with an inclined plane, on which thc end of the binding-screw rests to hold the knob'in whatever place it may be set, so' as to entirely dispense with washers and with screw holes in the shaft. l Y Y F v I makc'thewknobs A anddB, VVthe spring-bolt, and the roses C and D in any of the usual Ways, except -thet'I may have spurs or'ponts on the xosiesrneaii'their peripheriesfas'shown ata, b', e, 'and d; which, by beingep'ressed into the wood, as indicated. in the drawing, may serve the purpose of screws when Athe stile of the Adoor is very l "thin, lmt screws may at all times be used either with or without the spurs. I make' the shaft or spindle E to lit-the neck of one of the knobs, as B, in the usual way, as shown at e, and the 'other end, (for the inner side of the door,) on to which the neck of the knob A is to be secured', I make with an inclined plane on one of its' sides, 'as vshown at g, ou towhicb inclined plane the binding-screw` h (whielris tapped into thc'neek of the knob) is to'be screwed to hold the knob A in the desired position or location on the shaft or spindle E. l

Having made und nrrangedthe parts as before described, and fitted the latch-box or frame into the door,

and secured thc roses C and D, all in the usual way, Ipass the end g of vthe spindle E through the door, Ste. I

then slip-the neck ofthe other knob A on to the end g ofthe spindle E, and press it as tight aga-institherose `C 4as is desired, andturn in the screw h y(which is tapped into the neck ofthe knob) so as to Apress on the dat surface l 'of the inclined plane g, and hold the knob A'perfectly firm, and so that it cannot slip'. so as to loosen the knob and if (by the shrinkingof` the ,door or any other can-3e) there should at any time be too much end chase to tile spindle E, thescrew h may be turned back, (so'that it will cease to bind,) and the knobs be pressed towards each other, and the screw h be turned in again, as before, so that no washers or screw holes in the spindle will ever be needed in any case; thus 1 save all the expense for washers asd for drilli ng and tapping holes.

What I claim as my invention, und dosireto'sccurc by Letters Patent, is-

The-use of thc inclined plane g, in combination with the screw h ond the `neck ofthe knob A, when they are constructed, connected, and made to secure the knob A in the desired position on the spindle, substantially as herein described and set forth.

v CHAS. B. BRISTOL.

Witnesses:

W51. H. ANDREWS, R. FITZGERALD. 

